<template>
  <div>
    <el-input placeholder="输入关键字进行过滤" v-model="filterText"> </el-input>

    <el-tree
      class="filter-tree"
      :data="data"
      :props="defaultProps"
      default-expand-all
      :filter-node-method="filterNode"
      ref="tree"
      @node-click="handleNodeClick"
    >
    </el-tree>
  </div>
</template>

<script>
export default {
  name: "",
  components: {},
  props: {},
  data() {
    return {
      filterText: "",
      data: [
        {
          id: 1,
          label: "一级 1",
          children: [
            {
              id: 4,
              label: "二级 1-1",
              children: [
                {
                  id: 9,
                  label: "三级 1-1-1",
                },
                {
                  id: 10,
                  label: "三级 1-1-2",
                },
              ],
            },
          ],
        },
        {
          id: 2,
          label: "一级 2",
          children: [
            {
              id: 5,
              label: "二级 2-1",
            },
            {
              id: 6,
              label: "二级 2-2",
            },
          ],
        },
        {
          id: 3,
          label: "一级 3",
          children: [
            {
              id: 7,
              label: "二级 3-1",
            },
            {
              id: 8,
              label: "二级 3-2",
            },
          ],
        },
      ],
      defaultProps: {
        children: "children",
        label: "label",
      },
    };
  },
  filters: {},
  computed: {},
  watch: {
    filterText(val) {
      this.$refs.tree.filter(val);
    },
  },
  created() {},
  mounted() {},
  beforeDestroy() {},
  methods: {
    filterNode(value, data) {
      if (!value) return true;
      return data.label.indexOf(value) !== -1;
    },
    handleNodeClick(data, node) {
      if (!node.childNodes.length) {
        this.$emit('treeClick', data)
      }
    },
  },
};
</script>

<style scoped lang="scss"></style>
